Summary: Shared Memory Support for Object­based RPC
Ren'e W. Schmidt 3 , Jeffrey S. Chase y , and Henry M. Levy
Department of Computer Science and Engineering
University of Washington
Seattle, WA 98195
Abstract
This paper describes object­based runtime support
for efficient access to protected objects, i.e., objects
belonging to server programs that export protected ser­
vices to untrusted clients. Modern operating systems
use hardware­based protection domains to protect a
server's objects; clients access those objects through
cross­domain (RPC) calls to methods that execute
within the server's domain. Unfortunately, exclusive
use of RPC sacrifices performance in exchange for
protection.
We show how to provide safe and efficient ac­
cess to server data by client read­sharing of some
server objects and methods. Local client calls to read­
only methods execute directly in shared memory, with­

Source: Anderson, Richard - Department of Computer Science and Engineering, University of Washington at Seattle

Collections: Computer Technologies and Information Sciences